The difference between simple interest and compound interest on a sum of Rs 40,000 for two years is Rs 900. What is the annual rate of interest?

The difference between simple interest and compound interest on a sum of Rs 20,000 for two years is Rs 112.50. What is the annual rate of interest? Choose the correct answer from the following options:

Simple interest on a sum of Rs 3300 for 5 years is Rs 1980. What is the annual rate (in percentage) of interest?

The difference between simple and compound interest on Rs 1,000 for 3 years at 5% p.a. interest is: